Working

Here we have designed a fully automatic and configurable bell which can be used in schools and colleges. The heart of this project is PIC Mircocontroller.

Configuration: Initially we have to set the time, date and day. Also we have to set the number of bells/day and duration of ringing bell with respect to Long duration/Short duration.

Working: As the name itself indicates it will trigger bell automatically at a preset time interval. After thew configuration, the system starts to monitor the time. Once the time reaches to preset time interval then this module activates the bell. Similarly the process repeats for the remaining time intervals. Even we can set special time for Friday and Exam days. In the below video we have explained for 2 bells.

Output

Tips

Use Maxim Integrated’s DS3231 or DS3232 RTC for more accurate clock.

Use enough capacitors if you are connecting 5V relay to the same power supply. Otherwise relay switching can reset the microcontroller.